R7800 in AP mode has occasional degraded WIRED throughput (and unreliable wireless under good RF)
R7800 used in AP mode.
Set up on 5Ghz 80Mhz channel with no competitors (no other AP systems show up when monitoring wifi spectrum).
(2.4 radio shut off. Guess access shut off)
Nearby 2-stream clients show connected at MCS speed of 866Mbps.
They obtain almost bimodal speed test results approx 180-200bps and approx 360-400Mbps. This behavior is observed even very close to the R7800, and without moving or otherwise changing test conditions.
SO, wondered if the R7800 was having INTERNAL problems.
I set up and pre-tested/benchmarked an IPERF3 speed-test system, between a laptop and workstation, both hard-wired to GigE. They test at approx 944Mbps. (standard 1500 MTU; nothing fancy) Testing was 100% repeatable, test after test. Same speed over and over.
So, I moved the laptop and plugged it into one of the GigE ports on the back of the R7800, and ran IPERF3 testing between that laptop and a workstation elsewhere on the wired network. (Still a hard-wired ALL GigE path, but now looping through the R7800.)
I frequently observed 944. BUT, I also observed low 900s and high 800s. A couple of times I even saw results in the 500 range.
I think something is chewing-up the CPU inside the R7800, making it unable to even BRIDGE between its WAN port (in AP mode) and its GigE ports.
This same CPU exhaustion might explain the bi-modal behavior observed during the (optimal RF condition) wireless testing.
I was running firmware v184.108.40.206.
So I tried updating to v220.127.116.11-beta (the security hotfix). That did not improve things. (And it did not deliver the much-hoped-for access to Channel 144, needed to use that upper mid-band 80Mhz channel).
I have seen discussion that OLD firmware delivered improved performance on the R7800.
Has there been some sort of failure of regression testing on the R7800 Firmware?
Are recent firmware releases for the R7800 unable to provide full-speed operation? (Even when just bridging between the WAN port and client GigE ports, when the unit is operating in less-demanding AP mode; not doing NAT or filtering or any other potentially CPU-intensive "home router" activities).
Has anyone obtained definitive insight from Netgear Support on these slowdowns?
If the answer is to use ancient Firmware, then we'll be stuck without access to the 3rd 80Mhz block (no ch-144) forever.
There are not that many unused blocks where I live (lots of neighbors have 5Ghz systems).
If we can't make Ch-144 work, and can't deliver reliable high-speed operation, then the Netgear product is not an desirable AP device!
Small Netbuilder should definitely remove its recommendation for the R7800.